Rotary broaching-machine



E. G SIMPSON.

ROTARY BROACHING MACHINE.

APPLICATION FILED JAN-2, 1920.

Patented May 3,1921.

8 SHEETS-SHEET l.

E. G. SIMPSON.

ROTARY BROACHING MACHINE.

' APPLICATION FILED JAN. 2, 1920- I v '1 76,734, y Patented May 3, 1921.

8 SHEETS-SHEET 2.

E. G. SIMPSON.

ROTARY BROACHING MACHINE.

APPLICATION FILED JAN. 2, I920- 1,376,734. Patented May 3, 1921.

8 SHEETS-SHEET 3- ROTARY BR SIMPSON.

OACHING MACHINE.

FILED JAN 2 1,376,734 Patented May 3,1921.

' B SHEETSSHEET 4- E. G. SIMPSON.

Patented May 3, 1921.

8 SHEETSSHEET 5.

E. e. SIMPSON.

'ROTARY BROACHING MACHINE. APPLICATION FILED J N/2. 1920.

Patented May 3, 1921. I

3 SHEETS-SHEET 6.

6. SIM PSON.

BQRQACHING MACHINE.

FILED JAN. 2. 1920 I Patented May 3, 1921 8 SHEETS'SHEET 7.-

ROTARY APPLICAT UNITED STATES EMORY GLENN SIMPSON, OF DETROIT. MICHIGAN, ASSIGNOR TO PATENT lorries.

FISHER BODY GORr- PORATION, OF DETROIT, MICHIGAN, A CORPORATION OF NEW YORK.

ROTARY BROACHING-MACHINE.

To all whom it may concern:

Be it known that I, EMORY GLENN SIMP- sox, a citizen of the United States, residing at Detroit, in the county of \Vayne and State of Michigan, have invented certain new and useful Improvements in Rotary Broaching-Machines, of which the followin is a specification.

his invention relates to a rotary broaching machine and has for its object a broaching machine whichcan be used to simultaneously plane off the side edges of a metal member such as the leaves of a hinge, and other members of like character that need finishing. The blade carriers are in continuous rotation and consequently the work is very much expedited.

Apparatus for picking up and carrying the work into the path of the rotating broach blades is provided. This is set into operation by the foot of the operator and suitable devices are provided in the machine for picking the work up only at the required time to get into the path of the blades. The various features and improvements will be best understood when the machine is understood in detail.

In the drawings,-

Figure 1 is a plan view of the machine, the horizontal section shown being taken through the rotating blade carriers.

Fig. 2 is a side elevation taken from the right side of Fig. '1.

, Fig. 8 is a rear elevation of the machine.

Fig. 4 is an elevation of the face of the blade carrier.

Fig. 5 is a section on the line 55 of Fig. 4.

Fig. 6 is a section on the line 6-6 of Fig. 4.

Fig. 7 is a front elevation of the blade carriers indicating the progressive depth of cut of the blades.

Fig. 8 is a vertical section through the machine bed showing in side elevation the work carrier in two positions of its travel.

Fig. 9 is a vertical section and enlarged detail of the work carrier.

Fig. 10 is a perspective of the work-supporting block. o

Fig. 11 is a detail of one of the blade holding blocks.

Fig. 12 is a section on the line 12-12 of Fig. 8.

ig. 1 3 is a cross-section of the clutch longitudinally of the shaft.

Specification of Letters Patent.

Fig. 14 is a side elevation of the machine mounted upon its support.

F 1g. 15 is a section taken substantially on the line 1515 of Fig. 1 showing the brake Patented May 3, 1921.

Application filed January 2, 1920. Serial No. 348,966.

gitudinally' of the shaft showing the clutch release cam releasing the clutch plunger.

Referring to Fig. 14, possibly the most comprehensive view of the machine is shown. a designates a standard or pedestal on which the rotary broaching machine is mounted. The broaching machine frame is a casting b which needs no detailed description nor illustration as any suitable casting to hold the moving and rotating parts will Y serve the purpose. In Fig. 14, 0. designates the combined pulley wheel and fly wheel. Referring to the plan view shown in Fig. 1, it will be seen that the pulley wheel shaft is journaled in suitable pillow blocks with caps d and extends through to the opposite side of the machine where a pinion e mesheswith a large gear f and serves as a gear reduction. This large gear f is journaled in suitable journal bearings provided with caps g. lit will be seen that blade carriers kare clamped to this shaft by the clamps 71. Now referring to Fig. 4, a face elevation of the blade carrier will be seen and it will be noticed that the clamp z is merely a split hub that fits over the shaft j, to which the hub is keyed at in. Figs. 4 to 7 inclusive contained on this sheet will give an adequate idea of what the blade carrier is like. The

blades are. designated Z and are held in tapered recesses m by means of the tapered blocks n that can be secured to the blade carrier by the screws 0 which engage work. The two blade carriers it do not carry the blades directly,but an insertr is secured to the blade carriers by the screws 8 and this insert carries the blades.

The blade carriers or segments are rotating-continuousl The workis carried to simpl the blades by t e work carrier detailed in.

Figs. 8, 9 and 12. The slidet runs in a dove-tailed track u (Fig. 12) formed by bolting the strips '0 to the bosses upon the sides of the machine bed I), and also slides on a rib w in the middle of the dovetailed groove. This slide t is somewhat triangular in [general conformation (see Figs. 8 and 9) an on its forward face it is recessed as at m to receive the work-holding block .y. On .the forward end is bolted a clamping plate 2 provided with a pair of sprin -pressed plungers 1. The work plate an the clamping plate are here shown of suitable'configuration and; arrangement to accommodate the leaf of an automobile door hinge. This is slipped in between the work block and t e clamping plate and the two-plungers 1 afford sufiicient friction to hold the .work in place. It may not, however, be accurately centered. Provislon is made for centering the workby providin the blade carriers with hard steel inserts. he one on the left hand blade holder is designated 2 (Figs. 4 and 7) and is beveled off at its forward end as shown in Fig. 7. The one on the right tool holder is designated 3- and is also of hardened steel but is yieldable, being projected outwardly by a stiff coil spring when the two blade-carrying segments strike the work is these two beveled plates strike and move the work on the work block to a properlycentered position with respect to the two sets of broach blades which areshown in Fig; 7 as being'of increasingly greater projection to cut deeper into the work. i

As already explained, the broach-carrying se ents rotate continuously and are contamed under a proper hood (not shown) to protect the workman. It becomes necessary to bring the work within the range of the broach-carrying segments. plished automatically when the pedal 4 shown in Fig. 14 is depressed, This is connected with a rod 5, which asshown in Fi 16, connects with a clutch-releasing cam 1%.

This withdraws the clutch-releasing cam 17.

from engagement with the pin 18 on the clutch plunger 19. This clutch plunger is shown 1n Fig. 18. In thisfigure the pin 18 rests in the ove 20 in theside of the cam (see Fig. 17 As soon as this cam is withdrawn the head of the clutch plunger may. bear against the side of the clutch-driving disk 21' (Fig. 18) which is keyed to the shaft 7, When the plunger socket 22 comes around into registry with the clutch plun er this clutch plunger 19 is driven forward y the coil sprin 23 and springs into the plunger socket an thereby locks the clutch-driving disk 21 to the clutch-driven disk 24. Referring to Fig. 2, it will be seen. that this This 1s accom clutch-driven disk 24 is nothing more or less I than a crank with a connectin rod 25 secured thereto which connects WIth the work slide 23 already described.

The operation is simple: Supposing the work slide be in the position shown in the dotted lines of Fig. 8-the workman simply inserts the hinge leaf in between the workholding'block and the clamping block, the friction pins 1 serving to hold it from dropping out; he depresses his foot against the pedal 4 and. releases the clutch cam 17 which in turn releases the clutch plunger; the

head of this plunger then wipes the face or the clutch-drivin disk, which is continuously rotated. Vi hen the plunger socket 22 comes into registry with the plunger 19 the ,plunger immediately jumps into the socket and locks the two disks together. They then rotate together causing the connecting rod 25 to pull the work slide 25 into'the path of the rotating segments. These rotating blade-ca rying segments strike the slide at the time it has come to rest by reason of striking the stop 50 which holds the slide while the connecting rod is permitted to continue due to the yielding coupling furnished by the slot 51, plunger 52, and plug 53 (Fig. 8). The connecting rod does not again pick up the slide until the broach blades have passed through the work.

Inasmuch as the work block y is not on a true radius. and the blades are, the deliver a shearing cut to the hinge leaf. lso note that the workblock is on an inclination that causes the blades to strike first the upper or outside portion of the work and hence the Stress of the blades tends to drive the work against the block and hold it in the clamp As soon as the workman releases his oot on the pedal the clutch-releasing cam 17 springsback against the periphery of the driven-clutch disk 24, as shown in Fig. 16. M The forward end 26 is beveled, as shown clearly in Fig. 17. Hence when the pin 18 of the clutch plunger 19 strikes this beveled face it is caused. to withdraw the clutch plunger 19 from its socket 22 and the clutch releasing pin 18 then rests in the recess 20 of the releasing'cam lintil this cam is again withdrawn bythe depression of the foot the shaft by the spacing screw 55 and the clamping bolt and nut 56 (Fig. 1).

What I claim is:

1. A rotary broaching machine, having in combination, a rotating blade carrier, broaching blades projecting therefrom in the direction of the axis of rotation, and means for supporting the work in the path of the rotating blades and holding the same stationary during the operation of the blades thereon, said means operable to bring the work forward into the path of the blades and backward out of the path of the blades.

2. A rotary broaching machine, having in combination, a rotating blade carrier, broaching blades carried therein and progressively increasing in projection in thedirection of the axis of rotation and from the forward blade to the rear to increase the depth of the cut, and means for supporting work in the path of said blades.

3. A rotary broaching machine, having in combination a rotary blade carrier, broaching blades radially supported therein, and means for supporting the work in the path of the blades but at an inclination to a radial line so that the. radially-disposed blades strike first the outside of the work and travel in upon the work.

4. A rotary broaching machine, having in combination, a rotary blade carrier, broaching blades carried therein, and a work slide for sliding the work in and out of the path of the rotating broaching blades.

5. A rotarybroaching machine, having in combination, a rotary blade carrier, broaching blades carried therein, a slide slidable in and out of the path of the broaching blades, and means for automatically sliding the work in and out of the path of the broaching blades when the said automatic means is actuated.

6. A rotary broaching machine, having in combination, a rotary blade carrier, 'means for rotating the same, a slide adapted to carry the work in and out of the path of the blades, and connections between the rotating means and the slide for carrying the slide in and out of the path of the work when said connections are set to operate.

7. A rotary broaching machine, having in combination, a rotary blade carrier, broaching blades supported therein, means for rotating the carrier, a work slide sliding in and out of'the path of the blades, reciprocating connections for the slide between the rotary means and the slide and including a clutch whose parts engage to cause the said connections to reciprocate the slide to bring the work in and out of the path-of the blades.

8. A rotary broaching machine. having in combination, a rotary blade carrier, blades carried therein, a slide for supporting the work and sliding the same in and out of the path of the blades, means for rotating the blade carrier, and connections between the rotary means and the work slide including it out of the path of the blades and which is.

provided with means for automatically releasing the connections with the slide when the slide has been backed out.

9. A rotary broaching machine, having in combination, a rotary blade carrier, broaching blades therein, means for rotating the carrier, a slide for sliding the work in and. out of thepath of the blades, and connections between the rotating means and the slide including a clutch and a clutch-releasing cam, the clutch being provided with a clutch plunger, and a pair of clutch disks, said cam normally holding the plunger from looking the two disks together and when the cam is released the one disk being adapted to pick up the plunger to rotatethe two disks together for a complete revolution whereupon the cam disengages the clutch plunger and stops the slide after it has been backed out.

10. A rotary broaching machine, hav ng in combination, a continuously rotatmg blade carrier, broaching blades carried therein, a work slide adapted to slide in and out of the path of the blades, means for rotating the carrier, and connections between the carrier and the slide for reciprocating the slide and including a clutch made up of two disks, a clutch plunger, a clutch plunger pin, a releasing cam provided with a p n recess and a beveled forward end, the said releasing cam when released allowing the plunger to wipe the other disk and be picked up by the other disk to lock the two disks together and the said beveled end of the cam serving to disengage the plunger when the disks have made a complete rotation together so as to stop the Work slide when it has been backed out of the path of the blades.

11. A rotary broaching machine, having in combination, a pair of rotating blade can riers spaced apart from each other, broaching blades secured therein and having progressively greater projection toward the opposi te carrler from the first blade to the last blade, and means for rotating the carriers, the said blades adapted to straddle the work and simultaneously broach two sides of the same.

12. A rotary broaching machine, having in combination, a pair of blade carriers spaced apart, means for rotating the same, broaching blades carried ineach carrier, and

' work-centralizing devices secured on the carriers in advance of the broaching blades to centralize the work before it is struck by the tation, means for rotating the blade carriers,

means for SHPPOItlIlg. the work stationary in the path of the blades while they are operating on the same, and means for ejecting the work after the blades have passed over I the same.

15. A rotary broaching machine, having in combination,,a segment acting as a blade carrier, blades carried on the segment, means for continuously rotating the segment and means for ejecting the work from the path of the blades when they have passed by.

16. A rotary broaching machine, having in combination, a segment acting as a blade carrier, broaching blades secured in the segment, means for supporting the work, and means for picking up the work support and sliding it into the path of the blades at a predetermined time before the blade segment comes into the position where the cuttin is done. i

a 1 A rotary broaching machine, having in combination, a segment for carrying the blades, broaching bla es carried on the segment, means for rotating the segment continuously, means for supporting the work, means for picking up the work support and sliding it into the path of the blades at a predetermined time before the blades come into the position Where thecutting is done, and means for ejecting the work su port out of the path of the blades after the b ades have passed by the work.

18. A rotary broaching machine, having in combination, a blade segment, broaching blades carried therein, and a work support 1n the form of a clamp and work-supporting block, the same being inclined with respect to the broaching blades so that the blades jam the work into the clampand block in passin over the same.

19 rotary broaching machine, comprising a rotary blade carrier, means for rotating the same, broaching blades carried on the carrier, a slide for supporting the work, and means for reciprocating the slide to bring the work intothe path of the blades before the blades come into the cuttin position and for taking the work out o the path of the blades after the blades leave the cutting position. i

20. A rotary broaching machine, having' roaching blades carried therein and means mcludm a slide for supporting the work, and means for reciprocating the slide to bring the work into the path of the blades before the blades reach the cutting position and to take the work out of the path of the blades after the blades have passed the cutting position, said devices for keeping the work slide stationary during the cutting operation.

21. A rotary broaching machine, having in combination, a rotary blade carrier,

' broaching blades carried therein, means for rotating the carrier, a slide for supporting the ,work, and means for reciprocatmg the slide to bring the work into the path of the blades before the blades reach the cutting position and to take the work out of the path of the blades after the blades leave the cutting position, the said means including a connecting rod that has a yieldable connection with the slide and a stop that stops the slide before the connecting rod reaches the limit of its movement, which stopping of the slide permits the same to remain stationary during the cutting operation.

22. Ina broaching machine, the combination of a rotary carrier, broaching blades carried thereon, means for rotating the carrier, and a work support comprising a slide, a block and a clamp, the latter two having an inclination with respect to the inclination of the blades to cause the blades to tend to jam the work into the clamp when they are en aged in the cutting operation.

23. n a rotary broaching machlne, the combination of a rotating earner, means i for rotating the same, broaching blades projecting. therefrom a progressively greater distance from the first one to the last one in.

the direction of theaxis of rotation, and a work support, the said'elements being arranged to bring the blades intermittently into cutting relation withthe-work which which is stationarily held during the cutting operation.

24. In a rotary broaching machine, the

ades when the same are op- 

